Minx Mark I to VIII (1945–1957)
The Minx sold between 1945 and 1947 had the same 1185 cc side-valve engine, the same wheelbase and virtually the same shape as the prewar Minx. This postwar Minx became known as the Minx Mark I (or Minx Phase I). This was the first Minx with a protruding boot (trunk) that nodded to the Ponton, three-box design by then replacing the 'flat back' look, inherited from models that had debuted in the 1930s. Between 1947 and 1948, Hillman offered a modified version they called the Minx Mark II.
A much more modern-looking Minx, the Mark III, was sold from 1948. Three different body styles were offered initially, these being saloon, estate car and drophead coupé (convertible). Beneath the metal, however, and apart from updated front suspension, little had changed: the Mark III retained the 1185 cc side-valve engine of its predecessor. Claimed power output, at 35 bhp, was also unchanged. However, in 1949 the old engine was bored out and compression ratio increased, for the Minx Mark IV, to 1265 cc, and power output increased by 7 per cent to 37.5 bhp. A Mark IV saloon tested by The Motor magazine in 1949 had a top speed of 67 mph and could accelerate from 0–60 mph in 39.7 seconds. A fuel consumption of 32.1 mpgimp was recorded. The test car cost £505 including taxes, the price including radio (£36), over-riders (£5) and heater (£18).[12]
The Mark V, introduced in 1951, featured side chromium trim and a floor-mounted handbrake.[13] It also featured vertical chrome strips on either side of the front grille.[14]
The Mark VI of 1953 featured a new grille, revised combustion chambers and a two-spoke steering wheel.[13] A fourth body variation was added, badged as the Hillman Minx Californian, a two-door hard-top coupé with, slightly unusually, a b-pillar that wound down out of sight along with the rear side window to give an unbroken window line when all windows were fully opened: the rear window assembly was of a three-piece wrap-around form.[15] The wheelbase and overall length of the car remained the same as those of the four-door saloon and convertible permutations. The Mark VII, also introduced in 1953, featured longer rear mudguards and a bigger boot.[13] For the Mark VIII, in 1954, a new ohv 1390 cc engine was installed. This engine, two years later, went into the first of the new "Audax series" Minxes.
For a short time in the early 1950s, Hillman Minxes were sold in the US to Americans seeking better gas mileage. American reviews of the vehicle were lukewarm.[16]
The Mark VI to Mark VIII was produced in Japan by Isuzu between 1953 and 1956, as the Isuzu Hillman Minx,[17][18] prior to their 1961 introduction of the Bellel.[9]
A 2-door coupé utility variant of the Minx Mark VIII was produced by Rootes Australia as the Hillman de luxe Utility, circa 1956.[11]